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Finding the Fourth Proportional to 21,755.76, 30,023.16 and 12,324.12

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Solution

The fourth proportional to 21,755.76, 30,023.16 and 12,324.12 is: 17,007.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,755.76 : 30,023.16 = 12,324.12 : x
  2. Step 2: Convert to fraction form
    21,755.76/30,023.16 = 12,324.12/x
  3. Step 3: Cross multiply
    21,755.76x = 30,023.16 × 12,324.12
  4. Step 4: Simplify right side
    21,755.76x = 370,009,026.62
  5. Step 5: Solve for x
    x = 370,009,026.62/21,755.76
  6. Step 6: Final answer
    x = 17,007.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.